Search results for "NIGER"
showing 10 items of 171 documents
La terapia delle parole. Conversazione con Wole Soyinka
2012
Intervista con Wole Soyinka, Premio Nobel per la Letteratura (1986), riguardo la sua produzione teatrale e letteraria e l'attività politica
The prevalence of onchocerciasis in Africa and Yemen, 2000-2018: a geospatial analysis.
2022
Abstract Background Onchocerciasis is a disease caused by infection with Onchocerca volvulus, which is transmitted to humans via the bite of several species of black fly, and is responsible for permanent blindness or vision loss, as well as severe skin disease. Predominantly endemic in parts of Africa and Yemen, preventive chemotherapy with mass drug administration of ivermectin is the primary intervention recommended for the elimination of its transmission. Methods A dataset of 18,116 geo-referenced prevalence survey datapoints was used to model annual 2000–2018 infection prevalence in Africa and Yemen. Using Bayesian model-based geostatistics, we generated spatially continuous estimates o…
Amylase production in submerged culture using principal component analysis
1989
Abstract The aim of our work was to study the production of α-amylase and glucoamylase in submerged culture by a species of Aspergillus niger screened for its high amylase activity. Statistical analysis was not used to optimize fermentation conditions but it was employed in a new approach to describe the culture behaviour. Principal component analysis (PCA) was applied to describe the influence of three agitation speeds on the rate of amylases synthesis and on the evolution of other indirect growth factors. The results of this analysis showed that the oxygen transfer at various agitation speeds affected the levels of enzymes, their production rates and the CO 2 production rate (indirect mea…
Prevalence of Hearing Impairment Among High-Risk Newborns in Ibadan, Nigeria
2018
The burden of severe hearing impairment is increasing with two-thirds of these hearing impaired people residing in developing countries. Newborn hearing screening helps to identify early, babies who need intervention in order to prevent future disability. Neither universal nor targeted hearing screening programme is available in Nigeria. Objectives: This study was carried out to assess the prevalence of hearing impairment among high-risk newborns in UCH and the associated risk factors. Materials and Methods: Two hundred one newborns in the neonatal unit of UCH with risk factors for hearing impairment had hearing screening done using automated auditory brainstem response (AABR) at 30, 45, an…
The ability of soil-borne fungi to degrade organophosphonate carbon-to-phosphorus bonds
1997
The ability of a wide variety of soil-borne fungal strains to degrade four structurally different compounds containing P-C bonds, namely the naturally occurring amino acid ciliatine, the popular herbicide glyphosate, phosphonoacetic acid and 2-amino-3-phosphonopropionic acid, was studied in order to show that soil fungi may play an important role in the biodegradation of organophosphonates. Most of the strains appeared to utilize ciliatine as the sole source of phosphorus for growth. Only a limited number of strains were able to grow on the other phosphonates used in this work. The strains of Trichoderma harzianum, Scopulariopsis sp. and Aspergillus niger chosen for more detailed study show…
Prefazione a Migrations / Migrazioni
2016
Preface to the poetry collection Migrations/Migrazioni explaining the project, and poetry and photograph selection
Migrations: An Afro-Italian Nights of the Poets / Migrazioni: La notte dei poeti afro-italiana
2012
Poesie commissionate a 16 poeti italiani e 16 poeti nigeriani in occasione del Lagos Black Heritage Festival del 2012, tenutosi a Lagos, Nigeria, dedicato ai rapporti tra Africa e Italia. Tra i poeti nigeriani Soyinka, J.P. Clark, O. Ofeimun, C. Abani, J. Verissimo; tra i poeti italiani Dario Fo, Valerio Magrelli, Stefano Benni, Jolanda Insana, Gezim Hajdari, Ascanio Celestini.
Compagno di strada
2012
Introduzione alla figura e all'opera del primo Premio Nobel per la Letteratura africano, Wole Soyinka, autore prolifico e attivista nigeriano, e alla sua ricezione in Italia
Teacher Shortages, Teacher Contracts and their Impacton Education in Africa
2007
Primary school enrolment rates are very low in francophone Africa. In order to enhance education supply, manycountries have launched large teacher recruitment programmes in recent years, whereby teachers are no longer engaged on civil servant positions, but on the basis of (fixed-term) contracts typically implying considerably lower salaries and a sharply reduced duration of professional training. While this policy has led to a boost of primary enrolment, there is a concern about a loss in the quality of education. In this paper we analyse the impact on educational quality, by estimating nonparametrically the quantile treatment effects for Niger, Togo and Mali, based on very informative dat…